<template>
    <div class="itxst">
        <div class="col">
            <div class="title">
                请将左面的选项项拖到右边完成排序
            </div>
            <draggable v-model="changeSortList" :move="onLeftMove" animation="300"
                       chosen-class="chosenClass"
                       class="left-draggable" drag-class="dragClass"
                       ghost-class="ghostClass" group="site" @end="onEnd" @start="onStart"
            >
                <transition-group class="left-draggable-group">
                    <div v-for="item in changeSortList" :key="item.value" class="item">
                        <span class="item-name">
                            {{ item.label }}
                        </span>
                    </div>
                </transition-group>
            </draggable>
        </div>
        <div class="col">
            <div class="title">
                上下可拖动排序
            </div>
            <draggable v-model="changeValue" :move="onRightMove" animation="100"
                       chosen-class="chosenClass"
                       class="right-draggable" drag-class="dragClass"
                       ghost-class="ghostClass"
                       group="site"
                       @end="onEnd" @start="onStart"
            >
                <transition-group class="right-draggable-group">
                    <div v-for="(item,index) in changeValue" :key="item.value" class="item">
                        <span class="seq-num">
                            {{ index + 1 }}
                        </span>
                        <span class="item-name">
                            {{ item.label }}
                        </span>
                    </div>
                </transition-group>
            </draggable>
        </div>
    </div>
</template>

<script>
import draggable from 'vuedraggable'
import mixin from '../mixin'

export default {
    name: 'TSort',
    components: {
        draggable
    },
    mixins: [mixin],
    props: ['sortList'],
    data() {
        return {
            changeSortList: this.sortList
        }
    },
    watch: {
        sortList(val) {
            this.changeSortList = val
        }
    },
    methods: {
        onLeftMove(e, originalEvent) {
            if (e.to.className !== 'right-draggable-group') {
                return false
            }
            // false表示阻止拖拽
            return true
        },
        onRightMove(e, originalEvent) {
            if (e.to.className !== 'right-draggable-group') {
                return false
            }
            // false表示阻止拖拽
            return true
        },
        onStart() {
        },
        onEnd() {
        }

    }
}
</script>

<style lang="scss" scoped>
.ghostClass {
}

.chosenClass {
  opacity: 1 !important;
}

.dragClass {
  opacity: 1 !important;
  box-shadow: none !important;
  outline: none !important;
  background-image: none !important;
}

.itxst {
  margin: 10px;
}

.title {
  padding: 6px 12px;
}

.col {
  width: 40%;
  flex: 1;
  padding: 10px;
  border: solid 1px #eee;
  border-radius: 5px;
  float: left;
  min-height: 150px;
}

.col + .col {
  margin-left: 10px;
}

.item {
  line-height: 30px;
  height: 30px;
  border: solid 1px #eee;

  &:hover {
    background-color: #fdfdfd;
    cursor: move;
  }

  .item-name {
    margin-left: 10px;
  }
}

.item + .item {
  margin-top: 6px;
}

.right-draggable {
  min-height: 100px;

  .right-draggable-group {
    min-height: 100px;
    display: block;
  }
}

.seq-num {
  width: 20px;
  height: 20px;
  border-radius: 20px;
  background-color: #409EFF;
  display: inline-block;
  text-align: center;
  color: #FFFFFF;
  line-height: 20px;
  margin: 0px 5px;

}
</style>
